Question

Which of these is the SAME as 800.4 x 800.6? (Note: You need not calculate)
A (800 x 800 +0.6 x 0.4 x 800 +0.6 x 0.4)
B. (800 x 800 +0.6 x 0.4 x 800 +0.6 +0.4)
C. (800 x 800 + (0.6 + 0.4) x 800 + 0.6 x 0.4)
D. (800 x 800 + (0.6 + 0.4) x 800+ 0.6 +0.4)​

Answer 1

Answer:

option C is the correct answer

Step-by-step explanation:

800*800 + 1*800 +.24

Answer 2

Answer:

C is the correct answer.

Step-by-step explanation:

800.4 x 800.6

= ( 800 + 0.4 )( 800 + 0.6 )

= { 800 x 800 + 800 x 0.6 + 800 x 0.4 + 0.6 x 0.4 }

= { 800 x 800 + ( 0.6 + 0.4 ) x 800 + 0.6 x 0.4 }

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